Device for recovering arsenic oxide in tail gas of arsenic oxide preparation process

Abstract

The utility model relates to a device for recovering arsenic oxide in arsenic oxide preparation process tail gas. The device comprises a filter chamber, a non-woven fabric filter screen, an ash shaking mechanism, a waste gas treatment bottle and a pressure sensor, a plurality of groups of non-woven fabric filter screens are inserted into the filter chamber to divide the filter chamber into a plurality of chambers; an air pressure sensor is mounted above each cavity, and a storage cavity is connected to the lower part of each cavity; the driving motor is fixedly installed above the cavity, one end of the transmission shaft is fixedly connected with a rotating shaft of the driving motor, the other end of the transmission shaft is fixedly provided with a first bevel gear and extends into the cavity, the driving rod is horizontally arranged, the driving rod is fixedly sleeved with a plurality of sets of cams, the middle of the driving rod is fixedly sleeved with a second bevel gear, and conduction frames corresponding to the cams are fixed to the non-woven fabric filter screen. The waste gas treatment bottle is sealed through a rubber plug, waste gas treatment liquid is contained in the waste gas treatment bottle, a gas outlet pipe and a ventilation pipe are inserted into the rubber plug, one end of the gas outlet pipe is immersed in the waste gas treatment liquid, and the other end of the gas outlet pipe is fixedly connected with a gas outlet.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a device for recovering arsenic oxide in tail gas of an arsenic oxide preparation process. Background Art

[0002] Arsenic oxide refers to arsenic trioxide, which is used as a deoxidizer and high-temperature clarifier for glass in the glass industry, and in the preparation of medicines, pesticides, herbicides, for washing wool, refining metallic arsenic, making arsenic alloys and preparing semiconductors. It is also used in the production of arsenic-containing pesticides, and can also be used as a preservative for articles, a boiler antiscalant, and a chemical analysis reagent.

[0003] The tail gas of the existing arsenic oxide preparation process is generally sent to a bag dust collector through an exhaust fan to recover solid particle powder. The powder recovered by the bag dust collector cannot be recycled because it contains a large amount of dust in the air and can only be treated as solid waste.

[0004] A Chinese utility model with publication number CN204224275U discloses a device for recovering arsenic oxide in exhaust gas of an arsenic oxide preparation process, which filters and collects arsenic oxide in exhaust gas by arranging multiple groups of non-woven fabric filters in a dust collecting box, and connects a glass tube at the air inlet to a bottle filled with water to monitor whether the non-woven fabric filter is clogged. However, the device cannot accurately determine which non-woven fabric filter is clogged, and when replacing it, it is necessary to open the flange cover and take out the non-woven fabric filter for processing. During the replacement process, dust and air will enter the dust collecting box, polluting the internal environment and affecting the quality of the recovered arsenic oxide.

[0005] Based on this, it is necessary to study a device for recovering arsenic oxide from the tail gas of the arsenic oxide preparation process. Utility Model Content

[0006] In view of this, the purpose of the utility model is to provide an arsenic oxide recovery device in the exhaust gas of an arsenic oxide preparation process, which effectively solves the problem that the recovery device mentioned in the background technology cannot accurately determine which non-woven filter is blocked and that when it is blocked, removing the non-woven filter to clean it will cause air impurities to pollute the quality of recovered arsenic oxide.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an arsenic oxide recovery device in the tail gas of the arsenic oxide preparation process, characterized in that it includes: a filter chamber, a non-woven filter screen, a dust shaking mechanism, an exhaust gas treatment bottle and a pressure sensor;

[0008] An air inlet and an air outlet are respectively provided on opposite sides of the filter chamber;

[0009] A plurality of slots are provided on the inner wall of the filter chamber;

[0010] The non-woven fabric filters are arranged in multiple groups and correspondingly inserted into the slots, dividing the filter chamber into multiple chambers;

[0011] An air pressure sensor is installed above each chamber, and a material storage chamber is connected to the bottom of each chamber, and a discharge valve is installed below the material storage chamber;

[0012] The dust shaking mechanism includes a driving rod, a cam, a transmission shaft and a driving motor;

[0013] The driving motor is fixedly installed above the chamber;

[0014] One end of the transmission shaft is fixedly connected to the rotating shaft of the driving motor through a coupling, and the other end extends into the chamber and is fixedly sleeved with a first bevel gear;

[0015] The driving rod is arranged horizontally and parallel to the non-woven fabric filter screen, and a plurality of cams are fixedly mounted on the driving rod, and a second bevel gear meshing with the first bevel gear is fixedly mounted in the middle thereof;

[0016] A conducting frame corresponding to the cam is fixed on the nonwoven filter net, and the cam abuts against the conducting frame;

[0017] The waste gas treatment bottle is closed by a rubber stopper, and the waste gas treatment liquid is contained in the bottle;

[0018] An air outlet pipe and a vent pipe are inserted into the rubber plug, one end of the air outlet pipe is immersed in the waste gas treatment liquid, and the other end is fixedly connected to the air outlet.

[0019] Furthermore, a detection tube is fixed above the chamber, a pressure sensor is fixedly installed above the detection tube, and a dust blocking net is fixed inside the detection tube.

[0020] Furthermore, the storage cavity is in an inverted cone shape.

[0021] Furthermore, a motor seat is installed above the chamber, and the drive motor is installed on the motor seat, with the rotating shaft of the drive motor facing vertically downward.

[0022] Furthermore, the flow directions of the air inlet and the air outlet are perpendicular to the non-woven filter.

[0023] The beneficial effects of the above technical solution are:

[0024] The utility model adopts a filter chamber as a filtering body, inserts multiple groups of non-woven filter screens in the filter chamber, and divides the filter chamber into multiple chambers. The multiple groups of non-woven filter screens perform multi-layer filtering, which can ensure that arsenic oxide in the exhaust gas can be fully filtered and recovered. A storage chamber is arranged under each chamber, and the storage chamber is an inverted cone structure, which makes it convenient for the recovered arsenic oxide to be taken out through the discharge valve below, reducing the occurrence of problems such as wall residue.

[0025] At the same time, a pressure sensor is arranged above each chamber to detect the pressure value of each chamber, and to determine whether the non-woven filter is blocked by the change in pressure value. A glass tube is connected from the air outlet of the filter chamber and inserted into the waste gas treatment liquid in the waste gas treatment bottle. The recovered exhaust gas is purified by the waste gas treatment liquid and then discharged into the air to ensure the safety of emission.

[0026] A dust shaking mechanism is arranged on the filter chamber, and a driving motor is installed above each chamber through a motor seat. The rotating shaft of the driving motor is vertically downward and is fixedly connected to the transmission shaft. The other end of the transmission shaft drives the driving shaft to rotate through a bevel gear. A plurality of groups of cams are fixedly mounted on the driving shaft. The cams are respectively against a conductive frame fixed on the non-woven filter net. Through a series of transmissions of the driving motor, the cams push the conductive frame to cause the non-woven filter net to deform and recover, thereby shaking off the blocked arsenic oxide particles. There is no need to take them out for replacement and they are not in contact with the air, thereby ensuring the quality of filtration recovery and saving replacement time, which greatly increases the efficiency of filtration recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the utility model;

[0028] Figure 2 It is a side view of the dust shaking mechanism of the utility model.

[0029] Figure numerals: 1 is a filter chamber, 2 is a storage chamber, 3 is a discharge valve, 4 is an air inlet, 5 is an air outlet, 6 is a non-woven filter, 601 is a conduction frame, 7 is a pressure sensor, 8 is a dust shaking mechanism, 801 is a drive motor, 802 is a motor seat, 803 is a transmission shaft, 804 is a coupling, 805 is a first bevel gear, 806 is a drive shaft, 807 is a cam, 808 is a second bevel gear, 9 is an exhaust gas treatment bottle, 10 is a rubber plug, 11 is an exhaust gas treatment liquid, 12 is an exhaust pipe, and 13 is a ventilation pipe. DETAILED DESCRIPTION

[0030] The utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods:

[0031] Example 1. This example aims to provide an arsenic oxide recovery device in the exhaust gas of an arsenic oxide preparation process, which is mainly used to recover the arsenic oxide in the exhaust gas generated by the arsenic oxide preparation process. In view of the problem that the recovery device mentioned in the background technology cannot accurately determine which non-woven filter is blocked and that when it is blocked, the air impurities that are caused by taking out the non-woven filter to clean it will pollute the quality of recovered arsenic oxide, this example provides an arsenic oxide recovery device in the exhaust gas of an arsenic oxide preparation process.

[0032] like Figure 1-2As shown in the figure, an arsenic oxide recovery device in the tail gas of an arsenic oxide preparation process includes: a filter chamber 1, a non-woven filter mesh 6, a dust shaking mechanism 8, a waste gas treatment bottle 9 and a pressure sensor 7; the filter chamber 1 is a box-type structure, which is closed on the top by a cover plate, and two groups of slots are opened on the two inner side walls of the filter chamber 1, and an air inlet 4 and an air outlet 5 are respectively opened on the other two side walls, and the flow direction of the air inlet 4 and the air outlet 5 is perpendicular to the non-woven filter mesh 6.

[0033] The non-woven filter 6 has good air permeability and can intercept arsenic oxide particles, and is very suitable for filtering exhaust gas. A conductive frame 601 is fixed on the non-woven filter 6. The conductive frame 601 is composed of four vertical conductive rods arranged at intervals and fixed on the non-woven filter 6. Two non-woven filter nets 6 are correspondingly inserted into the slots of the filter chamber 1 to divide the filter chamber 1 into three chambers. A detection tube is arranged above each chamber, and a pressure sensor 7 is fixed above the detection tube, and the value of the air pressure inside the chamber can be displayed. A dust blocking net is arranged in the detection tube, and the dust blocking net can prevent arsenic oxide particles from entering the pressure sensor 7 and affecting the normal use of the sensor. A storage chamber 2 is connected to the bottom of each chamber, and a discharge valve 3 is arranged below the storage chamber 2. The arsenic oxide collected by filtering the non-woven filter 5 is accumulated in the storage chamber 2 and can be taken out as needed through the discharge valve 3.

[0034] Two motor seats 802 are fixed above the filter chamber 1, and the motor seats 802 are on one side of the non-woven filter screen 6; the driving motor 801 is installed on the motor seat 802, and its motor shaft is vertically downward. The upper end of the transmission shaft 803 is fixedly connected to the motor shaft through a coupling 804, and the lower end of the transmission shaft 803 extends into the chamber, and a first bevel gear 805 is fixed at its end. The driving shaft 806 is arranged horizontally, and its two ends are respectively rotatably mounted on the inner wall of the filter chamber 1. The driving shaft 806 is parallel to the non-woven filter screen 6, and four cams 807 corresponding to the conduction rods are fixedly mounted on the driving shaft 806, and the cams 807 are correspondingly abutted against the conduction rods. A second bevel gear 808 meshing with the first bevel gear 805 is fixed in the middle of the driving shaft 806.

[0035] The driving motor 801 drives the transmission shaft 803 to rotate, and then drives the driving shaft 806 to rotate through the meshing transmission of the first bevel gear 805 and the second bevel gear 808. The cam 807 on the driving shaft 806 rotates, and the cam 807 begins to squeeze and push the conductive frame 601, so that the non-woven filter screen 6 is continuously pushed, thereby generating shaking to shake off the blocked arsenic oxide particles and drop them into the storage chamber 2.

[0036] The mouth of the waste gas treatment bottle 9 is sealed by a rubber stopper 10, and the bottle is filled with a waste gas treatment liquid 11. An outlet pipe 12 and a vent pipe 13 are inserted into the rubber stopper 10. One end of the outlet pipe 12 is immersed in the waste gas treatment liquid, and the other end is fixedly connected to the outlet port 5. The filtered and recovered waste gas directly enters the waste gas treatment liquid 11 through the outlet pipe 12, and the waste gas is purified and then discharged through the vent pipe 13.

[0037] During specific use, it is possible to determine whether the non-woven filter 6 is blocked by observing the reading of the pressure sensor 7. During normal use, the readings of the three pressure sensors 7 should be roughly the same. When the reading of the first pressure sensor 7 from right to left is much higher than that of the other two pressure sensors 7, it means that the non-woven filter 6 on the right is blocked. At this time, turn on the right drive motor 801 to shake and clean the non-woven filter 6. After the pressure sensor reading is restored, the drive motor can be turned off. When the readings of the two pressure sensors 7 from right to left are higher than those of the third pressure sensor 7, it means that the non-woven filter 6 on the left is blocked. Turn on the left drive motor 801 to clean it. There is no need to open the cover to clean the non-woven filter 6. The device can clearly distinguish which non-woven filter 6 is blocked, and there is no need to open the cover to clean the non-woven filter 6, which effectively prevents impurities in the air from entering the filter chamber 1 to pollute the recovered arsenic oxide, and has good economic benefits.

[0038] The implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A device for recovering arsenic oxide from tail gas in an arsenic oxide preparation process, characterized in that: include: Filter chamber, non-woven filter, dust shaking mechanism, exhaust gas treatment bottle and pressure sensor; An air inlet and an air outlet are respectively provided on opposite sides of the filter chamber; A plurality of slots are provided on the inner wall of the filter chamber; The non-woven fabric filters are arranged in multiple groups and correspondingly inserted into the slots, dividing the filter chamber into multiple chambers; An air pressure sensor is installed above each chamber, and a material storage chamber is connected to the bottom of each chamber, and a discharge valve is installed below the material storage chamber; The dust shaking mechanism includes a driving rod, a cam, a transmission shaft and a driving motor; The driving motor is fixedly mounted above the chamber; One end of the transmission shaft is fixedly connected to the rotating shaft of the driving motor through a coupling, and the other end extends into the chamber and is fixedly sleeved with a first bevel gear; The driving rod is arranged horizontally and parallel to the non-woven fabric filter screen, and a plurality of cams are fixedly mounted on the driving rod, and a second bevel gear meshing with the first bevel gear is fixedly mounted in the middle thereof; A conducting frame corresponding to the cam is fixed on the nonwoven filter net, and the cam abuts against the conducting frame; The waste gas treatment bottle is closed by a rubber stopper, and the waste gas treatment liquid is contained in the bottle; An air outlet pipe and a vent pipe are inserted into the rubber plug, one end of the air outlet pipe is immersed in the waste gas treatment liquid, and the other end is fixedly connected to the air outlet.

2. The device for recovering arsenic oxide from tail gas in an arsenic oxide preparation process according to claim 1, characterized in that: A detection tube is fixed above the chamber, a pressure sensor is fixedly installed above the detection tube, and a dust blocking net is fixed inside the detection tube.

3. The device for recovering arsenic oxide in tail gas of an arsenic oxide preparation process according to claim 2, characterized in that: The material storage cavity is in an inverted cone shape.

4. The device for recovering arsenic oxide from tail gas in an arsenic oxide preparation process according to claim 3, characterized in that: A motor seat is installed above the chamber, and the driving motor is installed on the motor seat, with the rotating shaft of the driving motor facing vertically downward.

5. The device for recovering arsenic oxide in tail gas of an arsenic oxide preparation process according to any one of claims 1 to 4, characterized in that: The flow directions of the air inlet and the air outlet are perpendicular to the non-woven fabric filter.

Images